You could probably go to mthfr.net and read some of the articles Ben Lynch has written and go ahead and take the supplements and see if they make you feel better I guess?
Methylfolate in particular can have strong reactions, so I would have been a bit reluctant to experiment on my 3 year old without my Dr’s guidance. My son has
been taking a really low dose of the supplements for about 2 weeks now though and I have to say he’s a lot calmer, happier, nicer and hungrier than he was beforehand. It could be a coincidence though! I’ve got my fingers crossed.
There’s a lot of sensible info at mthfr.net.